<template>
  <div class="app-container">
    课程列表

    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称" />
      </el-form-item>

      <el-form-item>
        <el-select
          v-model="courseQuery.status"
          clearable
          placeholder="课程状态"
        >
          <el-option value="Normal" label="已发布" />
          <el-option value="Draft" label="未发布" />
        </el-select>
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="getList()"
        >查询</el-button
      >
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table :data="list" border fit highlight-current-row>
      <el-table-column label="序号" width="70" align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称" width="80" />

      <el-table-column label="课程状态" width="80">
        <template slot-scope="scope">
          {{ scope.row.status === "Normal" ? "已发布" : "未发布" }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" />

      <el-table-column prop="gmtCreate" label="添加时间" width="160" />

      <el-table-column prop="viewCount" label="浏览数量" width="60" />

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/teacher/edit/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit"
              >编辑课程基本信息</el-button
            >
          </router-link>
          <router-link :to="'/teacher/edit/' + scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit"
              >编辑课程大纲息</el-button
            >
          </router-link>
          <el-button
            type="danger"
            size="mini"
            icon="el-icon-delete"
            @click="removeDataById(scope.row.id)"
            >删除课程信息</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />
  </div>
</template>
<script>
//引入调用teacher.js文件
import course from "@/api/edu/course";

export default {
  //写核心代码位置
  // data:{
  // },
  data() {
    //定义变量和初始值
    return {
      list: null, //查询之后接口返回集合
      page: 1, //当前页
      limit: 10, //每页记录数
      total: 0, //总记录数
      courseQuery: {}, //条件封装对象
    };
  },
  created() {
    //页面渲染之前执行，一般调用methods定义的方法
    //调用
    this.getList();
  },
  methods: {
    //创建具体的方法，调用teacher.js定义的方法
    //讲师列表的方法
    getList() {
      course.getListCourse().then((response) => {
        //请求成功
        //response接口返回的数据
        this.list = response.data.list;
      });
    },
    resetData() {
      //清空的方法
      //表单输入项数据清空
      this.courseQuery = {};
      //查询所有讲师数据
      this.getList();
    },
    removeDataById(id) {
      // debugger
      this.$confirm(
        "此操作将永久删除该课程，以及该课程下的章节和视频，是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      )
        .then(() => {
          return course.removeById(id);
        })
        .then(() => {
          this.fetchData();
          this.$message({
            type: "success",
            message: "删除成功!",
          });
        })
        .catch((response) => {
          // 失败
          if (response === "cancel") {
            this.$message({
              type: "info",
              message: "已取消删除",
            });
          }
        });
    },
  },
};
</script>
